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Abstract

The ozonolytic decomposition of terpenes and terpenoids during sampling on Tenax is investigated in an artificial air system at ambient concentration levels. The detrimental effect of 8-150 ppbv ozone depends on the chemical structure of the compounds: saturated terpenoids such as 1,8-cineole, camphor, and bornyl acetate are unaffected by ozone. The analytical recoveries are significantly enhanced for many compounds when the sampling duration is reduced from 10 m to 30 s, explained by the time available for ozonolysis. A miniature ozone scrubber with multiple layers of MnO(2)-coated copper nets has been developed and tested. The optimal number of plies is found to be eight, which ensures quantitative recoveries for all test compounds except alpha-terpinene, beta-caryophyllene, citral and citronellal. The results that are reported call into question previous data on terpenes and terpenoids and/or their oxidation products where measurements have been carried out without the prior removal of ozone.

Additional information

Authors: CALOGIROU A, JRC Ispra (IT);RICHTER LARSEN B, JRC Ispra (IT);BRUSSOL C, JRC Ispra (IT);DUANE M, JRC Ispra (IT);KOTZIAS D, JRC Ispra (IT)
Bibliographic Reference: Article: Analytical Chemistry (1995)
Record Number: 199511220 / Last updated on: 1995-10-10
Category: PUBLICATION
Original language: en
Available languages: en